HP XP P9000 Continuous Access Synchronous for Mainframe Systems User Guide

5. If you are changing the P-VOL Fence Level, select a new fence level from the list. This is optional.
• Data – The P-VOL is fenced if an update copy operation fails.
• Status – The P-VOL is fenced only if the main system is not able to change S-VOL status
to Suspended when an update copy operation fails.
• Never – The P-VOL is never fenced.
For more information, see “Fence Level options for I/O to the P-VOL after suspension” (page 36)
.
6. From the Copy Pace list, select the number of the tracks, 1-15, for the resync operations. The
default is 15.
• 3 is slow, and is used to lessen impact to host I/O.
• 15 is a fast pace. Host I/O performance can be lowered.
7. From the Priority list, enter the desired priority, or scheduling order, for the resync operation.
You can set priority from 0 to 256. The default is 32. For more on priority, see the descriptions
in “Priority for initial copy operations and scheduling order” (page 38).
8. From the Time Stamp list, select whether or not the host I/O time stamp is transferred from
P-VOL to S-VOL.
9. Click Set, and then Apply.
If the operation does not start normally, an error code displays in the Error Code column in
the Preview list. To display an error message, select the LDEV, right-click, and select Error
Detail.
10. Verify that the operation completed successfully and that pair status is Duplex on the Pair
Operation window. You can update the progress of the operation by clicking File/Refresh.
Deleting pairs
A Cnt Ac-S Z pair can be released or deleted. Doing this deletes the Cnt Ac-S Z relationship, though
not the volumes or their data.
• When it is no longer necessary to maintain a remote copy of the P-VOL, delete a pair from
the main system only. All update operations are stopped and pair status for both the P-VOL
and S-VOL changes to Simplex.
When a pair is released, the main system continues to accept write I/O to the former P-VOL
but does not keep track of the updates.
• Delete a pair from the remote system only for disaster recovery purposes. When you do this,
the remote system changes the S-VOL pair status to Simplex, the primary system detects that
the S-VOL status is Simplex, and then changes P-VOL status to Suspend-delete pair to RCU.
The CDELPAIR TSO command can be used to release Cnt Ac-S Z pairs from the MCU.
To restart a pair that was released from the remote system, you must release the pair from the
main system, then create the pair from the main system.
NOTE: When you release a pair from the remote system, remember that the S-VOL and P-VOL
are identical (for example, same volume label). Make sure to take appropriate precautions to
prevent a system problem due to duplicate volumes.
Procedure 12 To release a pair:
1. In Remote Web Console, click Actions > Remote Copy > Continuous Access Synchronous for
Mainframe > Pair Operation.
2. Change to Modify mode by clicking the icon.
3. In the tree, select CU or the CU grouping where the pair is located.
70 Pair operations